Data Sheet, Rev. 1
September 2001
E2500-Type 2.5 Gbits/s Electroabsorption Modulated Isolated
Laser Module (EM-ILM) for Ultralong-Reach Applications
The E2500 EM-ILM, the newest generation of the award-
winning 266-Type EM-ILM, features an integrated modulator
and laser chip, and provides a compact, cost-effective solu-
tion for extended-reach transmissions.
Features
■Integrated electroabsorptive modulator
■1.5 µm wavelength
■Characterized for 2.5 Gbits/s operation
■Very low dispersion penalty over 600 km
■Low modulation voltage
■Temperature stabilized
■Wavelengths selectable to ITU-T standards
■Ultrastable wavelength aging performance for
DWDM systems
Applications
■SONET/SDH extended-reach applications
■High-capacity DWDM system applications
■High-speed data communications
■Digitized video
Description
The E2500-Type EM-ILM is a 1.5 µm laser with an
integrated electroabsorptive modulator packaged in
an industry-standard, 14-pin butterfly package. The
device has been designed to be used in 2.5 Gbits/s
extended-reach applications where the distances
between regenerators is in the range of 150 km—
1000 km. To boost the transmitter power high enough
to reach the receiver, the device typically is coupled
with an erbium-doped fiber amplifier (EDFA) such as
Agere Systems Inc.’s 1724 EDFA. The standard
product is specified for use up to 360 km (E2505
Series) and 600 km (E2502 Series).
The E2500 EM-ILM can replace external modulators
in many applications. The nominal input impedance
for the modulator is 50 Ω. By integrating the
modulator with the laser chip, the device offers a
compact, cost-effective solution for extended-reach
transmission applications. It can also be specified for
WDM applications where wavelength selection is
required. Agere is providing devices compatible with
the ITU-T wavelength standards.
2Agere Systems Inc.
Data Sheet, Rev. 1
September 2001
Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
Description (continued)
The package also contains a thermoelectric cooler,
thermistor, back-facet monitor, and an optical isolator.
This device exhibits excellent wavelength stability,
supporting operation at 100 Gbits/s channel spacing,
assuming an end-of-life condition of < ±100 pm over 20
years for wavelength aging, with very low FIT rates.
Wavelength stabilization schemes are not required in
DWDM systems of this type, using Agere’s E2500-
Type EM-ILM.
The E2500-Type EM-ILM is qualified for DWDM appli-
cations to Bellcore TA-TSY-000468.
Module Characteristics
1-891a (F)
Figure 1. E2500 EM-ILM Schematic
Pin Information
Table 1. Pin Assignments
Package Type 14-pin butterfly with internal isolator
Fiber Standard single mode
Connector ST®
RF Input 50 Ω nominal
Bit Rate 2.5 Gbits/s
CASE OR
PACKAGE
GROUNDS
10 k
@ 25 °C
Ω
ISOLATOR
TEC
(
−
)(+) (
−
)(+) (+)
(
−
)(+)
1234567
141312111098
NOMINAL
Ω
IMPEDANCE
50
Pin Number Description
1Thermistor
2Thermistor
3 Laser anode
4 Monitor anode
5 Monitor cathode
6TEC (+)
7TEC (–)
8 Case ground
9 Case ground
10 Case ground
11 Laser modulator ground
12 Modulator anode (–)/50 Ω RF input
13 Laser/modulator ground
14 Case ground
Data Sheet, Rev. 1
September 2001 Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
Agere Systems Inc. 3
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operations section of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Characteristics
Parameter Conditions Limit Unit
Laser Diode Reverse Voltage CW 2 V
Laser Diode Forward Current CW 150 mA
Optical Output Power CW 10 mW
Modulator Reverse Voltage — 5 V
Modulator Forward Voltage — 1 V
Monitor Diode Reverse Voltage — 10 V
Monitor Diode Forward Current — 1 mA
Storage Temperature Range — –40 to +85 °C
Operating Temperature Range — 0 to 70 °C
Table 2. Optical and Electrical Specifications
Parameter Symbol Conditions Min Max Unit
Laser: Laser TOP (temperature of laser submount) = 15 °C to 35 °C, except where noted.
Threshold Current (BOL) ITH TLASER CHIP = TOP 535 mA
Forward Voltage VFIf = IOP @ TOP —2.0 V
Operating Current IOP TLASER CHIP = TOP 50 100 mA
Threshold Power PTH TLASER CHIP = TOP
If = ITH, VM = 0 V
—80µW
Fiber Output Power (peak) PPK TLASER CHIP = TOP
VM = 0 V, If = IOP
1— dBm
Peak Wavelength (wavelength can be
specified to the ITU-T wavelength chan-
nels)
λ0 VM = 0 V
TLASER CHIP = TOP
,
If = IOP
1530 1563 nm
Side-mode Suppression Ratio SMSR VM = 0 V, If = IOP
,TOP 30 — dB
Time Resolved Spectroscopy (chirp),
E2505 Series
TRSP-P 2.5 Gbits/s
VLOW = –1.5 V to –3.0 V
VHIGH = 0 V
If = IOP @ TOP
—0.25 Å
Time Resolved Spectroscopy (chirp),
E2502 Series
TRSP-P 2.5 Gbits/s
VLOW = –1.5 V to –3.0 V,
VHIGH = –0.3 V
If = IOP @ TOP
—0.15 Å
Dispersion Penalty DP 2.5 Gbits/s
360 km (E2505)
600 km (E2502)
VLOW = –1.5 V to –3.0 V
VHIGH = 0 V (E2505), –0.3 V (E2502)
IF = IOP @ TOP
—2.0dB
Data Sheet, Rev. 1
September 2001
Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
4Agere Systems Inc.
Characteristics (continued)
* Operation at a DT of 70 °C – TSET is guaranteed, where TSET is the laser temperature required to achieve the required ITU wavelength,
over life, in a DWDM system (TSET range is 15 °C to 35 °C). In a non-WDM application, TSET is 25 °C.
Modulator
Extinction Ratio ERRF VM = 0 V to –3.0 V, 2.5 Gbits/s 10 — dB
RF Return Loss (0 GHz to 2 GHz) S11 VM = –VPP/2
If = IOP
10 — dB
RF Return Loss (2 GHz to 3 GHz) S11 VM = –VPP/2
If = IOP
7—dB
RF Return Loss (3 GHz to 5 GHz) S11 VM = –VPP/2
If = IOP
3—dB
–3 dB Bandwidth BW VM = –VPP/2
If = IOP
3.5 — GHz
Modulator Current @ VM = 0 V, If = 50 mA ———15mA
Rise/Fall Time (20% to 80%) tR/tF——125ps
Monitor Diode
Monitor Current IBD TLASER CHIP = TOP
VBD = 5 V, If = IOP
40 1100 µA
Dark Current IDTLASER CHIP = TOP , VBD = –5 V —0.1 µA
Capacitance C VBD = 5 V, f = 1 MHz —25 pF
Thermistor
Resistance RTHERM T = 25 °C 9.5 10.5 kΩ
Thermistor Current ITC —10100µA
Thermistor B Constant B — 3700 4100 —
Thermoelectric Cooler
TEC Current ITEC TLASER CHIP = 15 °C
TCASE = 70 °C
— 1.3 A
TEC Voltage VTEC TLASER CHIP = 15 °C
TCASE = 70 °C
— 2.6 V
TEC Power PTEC TLASER CHIP = 15 °C
TCASE = 70 °C
— 3.0 W
TEC Capacity ∆TTCASE = 70 °C*— °C
Laser Module
Optical Isolation — TCASE = 0 °C to 65 °C30 — dB
Table 2. Optical and Electrical Specifications (continued)
Parameter Symbol Conditions Min Max Unit
Data Sheet, Rev. 1
September 2001 Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
Agere Systems Inc. 5
Characteristics (continued)
1-500(C).d
Figure 2. Typical Eye Pattern at 2.5 Gbits/s
184.5 mV
I = 50
V = –1.04 + 2.08 pp
P= –0.5 dBm
–15.5 mV
20 mV
/div
91.65 ns 100 ps/div 92.65 ns
Data Sheet, Rev. 1
September 2001
Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
6Agere Systems Inc.
Characteristics (continued)
1-930(C).c
Figure 3. BER vs. Optical Power (Typical)
0 km
107 km
122 km
202 km
337 km
640 km
–37 –36 –35 –34 –33 –32 –31 –30 –29 –28
–38
T = 25 PC
IBIAS (LASER) = 80 mA
VBIAS (MOD) = –1.0 Vdc
VPP (MOD) = 2.0 V
POUT = 1.9 dBm (PULSED)
EXT. RATIO (RF) = 11.4 dB
TEST CONDITIONS:
10–12
10–11
10–10
10–9
10–8
10–7
10–6
10–5
OPTICAL POWER (dBm)
BER
Data Sheet, Rev. 1
September 2001 Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
Agere Systems Inc. 7
Outline Diagram
1-520.h (F)
0.180 (4.56)
HEAT SINK
0.215 (5.45)
0.056 (1.42)
0.030 (0.75)
59.06 (1500.00)
MIN
0.10
(2.5)
0.260 (6.60)
0.215
(5.47)
REF
0.036
(0.91)
PIN 1
0.078 (1.98)
0.100 (2.54) TYP
0.105 (2.67) DIA
TYP (4) PLACES
0.020 (0.51) TYP
0.500 (12.70)
MIN
STRAIN
RELIEF
PIN 14
TRADEMARK, CODE, LASER SERIAL NUMBER,
AND DATE CODE IN APPROX. AREA SHOWN
0.200
(5.08)
~
1.025 (26.04)
0.10 ± 0.002
(2.54 ± 0.051)
0.213 (5.40) TYP
0.500
(12.70)
0.350
(8.89)
0.605
(15.37)
MAX
2.03 (51.6)
0.863 (21.91)
0.575 (14.61)
0.820 (20.83)
0.700 (17.78)
0.365
(9.27)
MAX
1.180 (29.97)
Data Sheet, Rev. 1
September 2001
Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
8Agere Systems Inc.
Ordering Information
Table 3. Ordering Information
Parameter Device Description
ITU-T Wave-
length (nm) Frequency (THz)
E2505 Series
360 km, Standard Fiber
E2505 Series
600 km, Standard Fiber
Code Comcode Code Comcode
1530.37 195.9 E2505H59 108319146 E2502H59 108319112
1531.15 195.8 E2505H58 108319138 E2502H58 108319104
1531.90 195.7 E2505H57 108319120 E2502H57 108319096
1532.68 195.6 E2505H56 108031683 E2502H56 108030990
1533.46 195.5 E2505H55 108031675 E2502H55 108030982
1534.25 195.4 E2505H54 108031667 E2502H54 108030974
1535.04 195.3 E2505H53 108031659 E2502H53 108030966
1535.82 195.2 E2505H52 108031642 E2502H52 108030958
1536.61 195.1 E2505H51 108031634 E2502H51 108030941
1537.4 195.0 E2505H50 108031626 E2502H50 108031006
1538.19 194.9 E2505H49 108031618 E2502H49 108030925
1538.98 194.8 E2505H48 108031600 E2502H48 108030917
1539.77 194.7 E2505H47 108031592 E2502H47 108030909
1540.56 194.6 E2505H46 108031584 E2502H46 108030891
1541.35 194.5 E2505H45 108031576 E2502H45 108030883
1542.14 194.4 E2505H44 108031568 E2502H44 108030875
1542.94 194.3 E2505H43 108031550 E2502H43 108030867
1543.73 194.2 E2505H42 108031543 E2502H42 108030859
1544.53 194.1 E2505H41 108031535 E2502H41 108030842
1545.32 194.0 E2505H40 108031527 E2502H40 108030933
1546.12 193.9 E2505H39 108031519 E2502H39 108030826
1546.92 193.8 E2505H38 108031501 E2502H38 108030818
1547.72 193.7 E2505H37 108031196 E2502H37 108030800
1548.51 193.6 E2505H36 108031188 E2502H36 108030792
1549.31 193.5 E2505H35 108031170 E2502H35 108030784
1550.12 193.4 E2505H34 108031162 E2502H34 108030776
1550.92 193.3 E2505H33 108031154 E2502H33 108030768
1551.72 193.2 E2505H32 108031147 E2502H32 108030750
1552.52 193.1 E2505H31 108031139 E2502H31 108030743
1553.33 193.0 E2505H30 108031493 E2502H30 108030834
1554.13 192.9 E2505H29 108031113 E2502H29 108030727
1554.94 192.8 E2505H28 108031105 E2502H28 108030719
1555.75 192.7 E2505H27 108031097 E2502H27 108030701
1556.55 192.6 E2505H26 108031089 E2502H26 108030693
1557.36 192.5 E2505H25 108031071 E2502H25 108030685
1558.17 192.4 E2505H24 108031063 E2502H24 108030677
1558.98 192.3 E2505H23 108031055 E2502H23 108030669
1559.79 192.2 E2505H22 108031048 E2502H22 108030651
1560.61 192.1 E2505H21 108031030 E2502H21 108030644
1561.42 192.0 E2505H20 108031121 E2502H20 108030735
1562.23 191.9 E2505H19 108031022 E2502H19 108030636
1530 to 1565 — E2505H 108031691 E2502H 108031014
Data Sheet, Rev. 1
September 2001 Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption Modulated
Agere Systems Inc. 9
Related Product Information
Table 4. Related Product Information
Description Part Number Document Number
1.5 mm EDFA 1724-Type DS98-412LWP
2.5 Gbits/s Receiver 1319-Type DS97-106LWP
1.5 mm Digital DFB Laser D2500-Type DS97-114LWP
1.3 mm Digital DFB Laser D2300-Type DS97-122LWP
2.5 Gbits/s Receiver with Clock Recovery 1320-Type DS97-113LWP
Data Sheet, Rev. 1
September 2001
Isolated Laser Module (EM-ILM)
E2500-Type 2.5 Gbits/s Electroabsorption
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
Copyright © 2001 Agere Systems Inc.
All Rights Reserved
September 2001
DS01-281OPTO-1 (Replaces DS01-281OPTO)
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET: http://www.agere.com
E-MAIL: docmaster@agere.com
N. AMERICA: Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA: Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon
Tel. (852) 3129-2000, FAX (852) 3129-2020
CHINA: (86) 21-5047-1212 (Shanghai), (86) 10-6522-5566 (Beijing), (86) 755-695-7224 (Shenzhen)
JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 778-8833, TAIWAN: (886) 2-2725-5858 (Taipei)
EUROPE: Tel. (44) 7000 624624, FAX (44) 1344 488 045
Laser Safety Information
Class IIIb Laser Product
This product complies with 21 CFR 1040.10 and 1040.11.
Single-mode connector.
Wavelength = 1.5 µm.
Maximum power = 10 mW.
Because of size constraints, laser safety labeling is not affixed to the module but attached to the outside of the
shipping carton.
Product is not shipped with power supply.
Caution: Use of controls, adjustments, and procedures other than those specified herein may result in
hazardous laser radiation exposure.
DANGER
INVISIBLE LASER RADIATION
IS EMITTED FROM THE END
OF FIBER OR CONNECTOR
Avoid direct exposure to beam
Do not view beam directly with
optical instruments
INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR
Avoid exposure to beam
Class 3B Laser Product IEC-60825M 1993 Max. Output: 10 mW Wavelength: 1.5 µm
